1021525451242 has 32 divisors (see below), whose sum is σ = 1718231087232. Its totient is φ = 452954118144.

The previous prime is 1021525451239. The next prime is 1021525451257. The reversal of 1021525451242 is 2421545251201.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 1021525451198 and 1021525451207.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9696103 + ... + 9800890.

It is an arithmetic number, because the mean of its divisors is an integer number (53694721476).

Almost surely, 2^{1021525451242} is an apocalyptic number.

1021525451242 is a deficient number, since it is larger than the sum of its proper divisors (696705635990).

1021525451242 is a wasteful number, since it uses less digits than its factorization.

1021525451242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19497102.

The product of its (nonzero) digits is 32000, while the sum is 34.

The spelling of 1021525451242 in words is "one trillion, twenty-one billion, five hundred twenty-five million, four hundred fifty-one thousand, two hundred forty-two".