1021121022111 has 16 divisors (see below), whose sum is σ = 1396773590016. Its totient is φ = 663332607936.

The previous prime is 1021121022073. The next prime is 1021121022127. The reversal of 1021121022111 is 1112201211201.

It is a happy number.

It is not a de Polignac number, because 1021121022111 - 2²² = 1021116827807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021121022151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28070095 + ... + 28106448.

It is an arithmetic number, because the mean of its divisors is an integer number (87298349376).

Almost surely, 2^{1021121022111} is an apocalyptic number.

1021121022111 is a deficient number, since it is larger than the sum of its proper divisors (375652567905).

1021121022111 is an equidigital number, since it uses as much as digits as its factorization.

1021121022111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56176702.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1021121022111 its reverse (1112201211201), we get a palindrome (2133322233312).

The spelling of 1021121022111 in words is "one trillion, twenty-one billion, one hundred twenty-one million, twenty-two thousand, one hundred eleven".