1111212022021 has 8 divisors (see below), whose sum is σ = 1137212556480. Its totient is φ = 1085218687392.

The previous prime is 1111212021971. The next prime is 1111212022027. The reversal of 1111212022021 is 1202202121111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1111212022021 - 2¹⁷ = 1111211890949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111212021986 and 1111212022004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111212022027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1487041 + ... + 2105638.

It is an arithmetic number, because the mean of its divisors is an integer number (142151569560).

Almost surely, 2^{1111212022021} is an apocalyptic number.

It is an amenable number.

1111212022021 is a deficient number, since it is larger than the sum of its proper divisors (26000534459).

1111212022021 is an equidigital number, since it uses as much as digits as its factorization.

1111212022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3599915.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1111212022021 its reverse (1202202121111), we get a palindrome (2313414143132).

The spelling of 1111212022021 in words is "one trillion, one hundred eleven billion, two hundred twelve million, twenty-two thousand, twenty-one".