121201201020 has 48 divisors (see below), whose sum is σ = 357224595840. Its totient is φ = 30619250496.

The previous prime is 121201201019. The next prime is 121201201063. The reversal of 121201201020 is 20102102121.

It is a super-2 number, since 2×121201201020² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 121201200987 and 121201201005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53157282 + ... + 53159561.

It is an arithmetic number, because the mean of its divisors is an integer number (7442179080).

Almost surely, 2^121201201020 is an apocalyptic number.

121201201020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121201201020 is an abundant number, since it is smaller than the sum of its proper divisors (236023394820).

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

121201201020 is a wasteful number, since it uses less digits than its factorization.

121201201020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106316874 (or 106316872 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121201201020 its reverse (20102102121), we get a palindrome (141303303141).

The spelling of 121201201020 in words is "one hundred twenty-one billion, two hundred one million, two hundred one thousand, twenty".