1051221031 has 8 divisors (see below), whose sum is σ = 1208034464. Its totient is φ = 896067360.

The previous prime is 1051221019. The next prime is 1051221047. The reversal of 1051221031 is 1301221501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1051221031 is a prime.

It is a super-2 number, since 2×1051221031² = 2210131312033405922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1051220996 and 1051221014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1051221001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 413580 + ... + 416113.

It is an arithmetic number, because the mean of its divisors is an integer number (151004308).

Almost surely, 2^1051221031 is an apocalyptic number.

1051221031 is a deficient number, since it is larger than the sum of its proper divisors (156813433).

1051221031 is an equidigital number, since it uses as much as digits as its factorization.

1051221031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829881.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 1051221031 is about 32422.5389351297. The cubic root of 1051221031 is about 1016.7901887841.

Adding to 1051221031 its reverse (1301221501), we get a palindrome (2352442532).

The spelling of 1051221031 in words is "one billion, fifty-one million, two hundred twenty-one thousand, thirty-one".