1022135621 has 8 divisors (see below), whose sum is σ = 1114024800. Its totient is φ = 932141232.

The previous prime is 1022135603. The next prime is 1022135633. The reversal of 1022135621 is 1265312201.

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

It is a cyclic number.

It is not a de Polignac number, because 1022135621 - 2¹⁸ = 1021873477 is a prime.

It is a super-2 number, since 2×1022135621² = 2089522455434111282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022135651) 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, 472571 + ... + 474728.

It is an arithmetic number, because the mean of its divisors is an integer number (139253100).

Almost surely, 2^1022135621 is an apocalyptic number.

It is an amenable number.

1022135621 is a deficient number, since it is larger than the sum of its proper divisors (91889179).

1022135621 is an equidigital number, since it uses as much as digits as its factorization.

1022135621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947395.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1022135621 is about 31970.8558064998. The cubic root of 1022135621 is about 1007.3247572682.

Adding to 1022135621 its reverse (1265312201), we get a palindrome (2287447822).

The spelling of 1022135621 in words is "one billion, twenty-two million, one hundred thirty-five thousand, six hundred twenty-one".