121122001010021 has 4 divisors (see below), whose sum is σ = 132133092010944. Its totient is φ = 110110910009100.

The previous prime is 121122001009963. The next prime is 121122001010033. The reversal of 121122001010021 is 120010100221121.

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 not a de Polignac number, because 121122001010021 - 2³⁴ = 121104821140837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121122001009978 and 121122001010005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121122001010081) 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, 5505545500445 + ... + 5505545500466.

It is an arithmetic number, because the mean of its divisors is an integer number (33033273002736).

Almost surely, 2^{121122001010021} is an apocalyptic number.

121122001010021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121122001010021 is a deficient number, since it is larger than the sum of its proper divisors (11011091000923).

121122001010021 is a wasteful number, since it uses less digits than its factorization.

121122001010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11011091000922.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121122001010021 its reverse (120010100221121), we get a palindrome (241132101231142).

The spelling of 121122001010021 in words is "one hundred twenty-one trillion, one hundred twenty-two billion, one million, ten thousand, twenty-one".