121210102111021 has 8 divisors (see below), whose sum is σ = 151119088346304. Its totient is φ = 94449430216320.

The previous prime is 121210102110943. The next prime is 121210102111081. The reversal of 121210102111021 is 120111201012121.

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 121210102111021 - 2³³ = 121201512176429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121210102110986 and 121210102111004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121210102111081) 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, 787078585060 + ... + 787078585213.

It is an arithmetic number, because the mean of its divisors is an integer number (18889886043288).

Almost surely, 2^{121210102111021} is an apocalyptic number.

121210102111021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121210102111021 is a deficient number, since it is larger than the sum of its proper divisors (29908986235283).

121210102111021 is a wasteful number, since it uses less digits than its factorization.

121210102111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1574157170291.

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

Adding to 121210102111021 its reverse (120111201012121), we get a palindrome (241321303123142).

The spelling of 121210102111021 in words is "one hundred twenty-one trillion, two hundred ten billion, one hundred two million, one hundred eleven thousand, twenty-one".