1101222100021 has 4 divisors (see below), whose sum is σ = 1101224990944. Its totient is φ = 1101219209100.

The previous prime is 1101222099977. The next prime is 1101222100037. The reversal of 1101222100021 is 1200012221011.

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 1101222100021 - 2¹⁷ = 1101221968949 is a prime.

It is a super-2 number, since 2×1101222100021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1101222099974 and 1101222100010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101222100061) 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, 768345 + ... + 1671166.

It is an arithmetic number, because the mean of its divisors is an integer number (275306247736).

Almost surely, 2^{1101222100021} is an apocalyptic number.

It is an amenable number.

1101222100021 is a deficient number, since it is larger than the sum of its proper divisors (2890923).

1101222100021 is an equidigital number, since it uses as much as digits as its factorization.

1101222100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2890922.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1101222100021 its reverse (1200012221011), we get a palindrome (2301234321032).

The spelling of 1101222100021 in words is "one trillion, one hundred one billion, two hundred twenty-two million, one hundred thousand, twenty-one".