2000021121220 has 48 divisors (see below), whose sum is σ = 4209633529920. Its totient is φ = 798182946176.

The previous prime is 2000021121179. The next prime is 2000021121221. The reversal of 2000021121220 is 221211200002.

It is a happy number.

It is a super-2 number, since 2×2000021121220² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2000021121220.

It is not an unprimeable number, because it can be changed into a prime (2000021121221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33798579 + ... + 33857701.

It is an arithmetic number, because the mean of its divisors is an integer number (87700698540).

Almost surely, 2^{2000021121220} is an apocalyptic number.

2000021121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2000021121220 is an abundant number, since it is smaller than the sum of its proper divisors (2209612408700).

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

2000021121220 is a wasteful number, since it uses less digits than its factorization.

2000021121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62964 (or 62962 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2000021121220 its reverse (221211200002), we get a palindrome (2221232321222).

The spelling of 2000021121220 in words is "two trillion, twenty-one million, one hundred twenty-one thousand, two hundred twenty".