1021400400532 has 6 divisors (see below), whose sum is σ = 1787450700938. Its totient is φ = 510700200264.

The previous prime is 1021400400511. The next prime is 1021400400607. The reversal of 1021400400532 is 2350040041201.

It can be written as a sum of positive squares in only one way, i.e., 867960542736 + 153439857796 = 931644^2 + 391714^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127675050063 + ... + 127675050070.

Almost surely, 2^{1021400400532} is an apocalyptic number.

It is an amenable number.

1021400400532 is a deficient number, since it is larger than the sum of its proper divisors (766050300406).

1021400400532 is a wasteful number, since it uses less digits than its factorization.

1021400400532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255350100137 (or 255350100135 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 1021400400532 its reverse (2350040041201), we get a palindrome (3371440441733).

The spelling of 1021400400532 in words is "one trillion, twenty-one billion, four hundred million, four hundred thousand, five hundred thirty-two".