1022121010091 has 16 divisors (see below), whose sum is σ = 1072831426560. Its totient is φ = 971939686080.

The previous prime is 1022121010073. The next prime is 1022121010111. The reversal of 1022121010091 is 1900101212201.

It is a cyclic number.

It is not a de Polignac number, because 1022121010091 - 2¹⁰ = 1022121009067 is a prime.

It is a super-2 number, since 2×1022121010091² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1022121010061) 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, 6862871 + ... + 7010223.

It is an arithmetic number, because the mean of its divisors is an integer number (67051964160).

Almost surely, 2^{1022121010091} is an apocalyptic number.

1022121010091 is a deficient number, since it is larger than the sum of its proper divisors (50710416469).

1022121010091 is a wasteful number, since it uses less digits than its factorization.

1022121010091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149146.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 1022121010091 its reverse (1900101212201), we get a palindrome (2922222222292).

The spelling of 1022121010091 in words is "one trillion, twenty-two billion, one hundred twenty-one million, ten thousand, ninety-one".