1101122021 has 4 divisors (see below), whose sum is σ = 1103480352. Its totient is φ = 1098763692.

The previous prime is 1101122017. The next prime is 1101122023. The reversal of 1101122021 is 1202211011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1101122021 - 2² = 1101122017 is a prime.

It is a super-2 number, since 2×1101122021² = 2424939410262248882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1101121993 and 1101122011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101122023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1178465 + ... + 1179398.

It is an arithmetic number, because the mean of its divisors is an integer number (275870088).

Almost surely, 2^1101122021 is an apocalyptic number.

It is an amenable number.

1101122021 is a deficient number, since it is larger than the sum of its proper divisors (2358331).

1101122021 is an equidigital number, since it uses as much as digits as its factorization.

1101122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2358330.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1101122021 is about 33183.1586953382. The cubic root of 1101122021 is about 1032.6309779962.

Adding to 1101122021 its reverse (1202211011), we get a palindrome (2303333032).

It can be divided in two parts, 11011 and 22021, that multiplied together give a triangular number (242473231 = T₂₂₀₂₁).

The spelling of 1101122021 in words is "one billion, one hundred one million, one hundred twenty-two thousand, twenty-one".