221020023130 has 16 divisors (see below), whose sum is σ = 399384046440. Its totient is φ = 88064008192.

The previous prime is 221020023097. The next prime is 221020023139. The reversal of 221020023130 is 31320020122.

It can be written as a sum of positive squares in 4 ways, for example, as 213877575961 + 7142447169 = 462469^2 + 84513^2 .

It is not an unprimeable number, because it can be changed into a prime (221020023139) 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, 42997435 + ... + 43002574.

Almost surely, 2^221020023130 is an apocalyptic number.

221020023130 is a deficient number, since it is larger than the sum of its proper divisors (178364023310).

221020023130 is a wasteful number, since it uses less digits than its factorization.

221020023130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86000273.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 221020023130 its reverse (31320020122), we get a palindrome (252340043252).

The spelling of 221020023130 in words is "two hundred twenty-one billion, twenty million, twenty-three thousand, one hundred thirty".