121232212020 has 144 divisors (see below), whose sum is σ = 393086034432. Its totient is φ = 30168737280.

The previous prime is 121232212019. The next prime is 121232212033. The reversal of 121232212020 is 20212232121.

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 = 121232211984 and 121232212002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 187372 + ... + 526851.

It is an arithmetic number, because the mean of its divisors is an integer number (2729764128).

Almost surely, 2^121232212020 is an apocalyptic number.

121232212020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121232212020 is an abundant number, since it is smaller than the sum of its proper divisors (271853822412).

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

121232212020 is a wasteful number, since it uses less digits than its factorization.

121232212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714302 (or 714297 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 121232212020 its reverse (20212232121), we get a palindrome (141444444141).

The spelling of 121232212020 in words is "one hundred twenty-one billion, two hundred thirty-two million, two hundred twelve thousand, twenty".