121302110021220 has 72 divisors (see below), whose sum is σ = 367951886143296. Its totient is φ = 32347040116032.

The previous prime is 121302110021179. The next prime is 121302110021251. The reversal of 121302110021220 is 22120011203121.

121302110021220 is a `hidden beast` number, since 1 + 21 + 302 + 1 + 100 + 21 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 121302110021193 and 121302110021202.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30353409 + ... + 34116471.

Almost surely, 2^{121302110021220} is an apocalyptic number.

121302110021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121302110021220 is an abundant number, since it is smaller than the sum of its proper divisors (246649776122076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121302110021220 is a wasteful number, since it uses less digits than its factorization.

121302110021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3942161 (or 3942156 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 121302110021220 its reverse (22120011203121), we get a palindrome (143422121224341).

The spelling of 121302110021220 in words is "one hundred twenty-one trillion, three hundred two billion, one hundred ten million, twenty-one thousand, two hundred twenty".