203121133402 has 32 divisors (see below), whose sum is σ = 337734411840. Its totient is φ = 90852222720.

The previous prime is 203121133399. The next prime is 203121133403. The reversal of 203121133402 is 204331121302.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (203121133403) 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, 51648 + ... + 639460.

It is an arithmetic number, because the mean of its divisors is an integer number (10554200370).

Almost surely, 2^203121133402 is an apocalyptic number.

203121133402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

203121133402 is a deficient number, since it is larger than the sum of its proper divisors (134613278438).

203121133402 is a wasteful number, since it uses less digits than its factorization.

203121133402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588078.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 203121133402 its reverse (204331121302), we get a palindrome (407452254704).

The spelling of 203121133402 in words is "two hundred three billion, one hundred twenty-one million, one hundred thirty-three thousand, four hundred two".