1021400204 has 36 divisors (see below), whose sum is σ = 1971925032. Its totient is φ = 462570240.

The previous prime is 1021400201. The next prime is 1021400209. The reversal of 1021400204 is 4020041201.

It is not an unprimeable number, because it can be changed into a prime (1021400201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133244 + ... + 140700.

Almost surely, 2^1021400204 is an apocalyptic number.

It is an amenable number.

1021400204 is a deficient number, since it is larger than the sum of its proper divisors (950524828).

1021400204 is a wasteful number, since it uses less digits than its factorization.

1021400204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7766 (or 7753 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1021400204 is about 31959.3523714108. The cubic root of 1021400204 is about 1007.0831123977.

Adding to 1021400204 its reverse (4020041201), we get a palindrome (5041441405).

The spelling of 1021400204 in words is "one billion, twenty-one million, four hundred thousand, two hundred four".