1021231401 has 16 divisors (see below), whose sum is σ = 1392914880. Its totient is φ = 665288000.

The previous prime is 1021231373. The next prime is 1021231417. The reversal of 1021231401 is 1041321201.

It is a cyclic number.

It is not a de Polignac number, because 1021231401 - 2⁷ = 1021231273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021231801) 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, 27115 + ... + 52703.

It is an arithmetic number, because the mean of its divisors is an integer number (87057180).

Almost surely, 2^1021231401 is an apocalyptic number.

It is an amenable number.

1021231401 is a deficient number, since it is larger than the sum of its proper divisors (371683479).

1021231401 is a wasteful number, since it uses less digits than its factorization.

1021231401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25896.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1021231401 is about 31956.7113608394. The cubic root of 1021231401 is about 1007.0276303853.

Adding to 1021231401 its reverse (1041321201), we get a palindrome (2062552602).

The spelling of 1021231401 in words is "one billion, twenty-one million, two hundred thirty-one thousand, four hundred one".