1010221251 has 16 divisors (see below), whose sum is σ = 1458100896. Its totient is φ = 618448896.

The previous prime is 1010221229. The next prime is 1010221253. The reversal of 1010221251 is 1521220101.

It is not a de Polignac number, because 1010221251 - 2⁷ = 1010221123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1010221251.

It is not an unprimeable number, because it can be changed into a prime (1010221253) 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, 59580 + ... + 74633.

It is an arithmetic number, because the mean of its divisors is an integer number (91131306).

Almost surely, 2^1010221251 is an apocalyptic number.

1010221251 is a deficient number, since it is larger than the sum of its proper divisors (447879645).

1010221251 is a wasteful number, since it uses less digits than its factorization.

1010221251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134422.

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 1010221251 is about 31783.9778976767. The cubic root of 1010221251 is about 1003.3955409187.

Adding to 1010221251 its reverse (1521220101), we get a palindrome (2531441352).

The spelling of 1010221251 in words is "one billion, ten million, two hundred twenty-one thousand, two hundred fifty-one".