203211021020 has 24 divisors (see below), whose sum is σ = 487706450784. Its totient is φ = 69672350016.

The previous prime is 203211020983. The next prime is 203211021031. The reversal of 203211021020 is 20120112302.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 203211020986 and 203211021004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 725753507 + ... + 725753786.

It is an arithmetic number, because the mean of its divisors is an integer number (20321102116).

Almost surely, 2^203211021020 is an apocalyptic number.

203211021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203211021020 is an abundant number, since it is smaller than the sum of its proper divisors (284495429764).

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

203211021020 is a wasteful number, since it uses less digits than its factorization.

203211021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1451507309 (or 1451507307 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 203211021020 its reverse (20120112302), we get a palindrome (223331133322).

The spelling of 203211021020 in words is "two hundred three billion, two hundred eleven million, twenty-one thousand, twenty".