1220072131 has 2 divisors, whose sum is σ = 1220072132. Its totient is φ = 1220072130.

The previous prime is 1220072089. The next prime is 1220072143. The reversal of 1220072131 is 1312700221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220072131 - 2¹⁷ = 1219941059 is a prime.

It is a super-2 number, since 2×1220072131² = 2977152009685762322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1220072099 and 1220072108.

It is not a weakly prime, because it can be changed into another prime (1220072171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610036065 + 610036066.

It is an arithmetic number, because the mean of its divisors is an integer number (610036066).

Almost surely, 2^1220072131 is an apocalyptic number.

1220072131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220072131 is an equidigital number, since it uses as much as digits as its factorization.

1220072131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 1220072131 is about 34929.5309301456. The cubic root of 1220072131 is about 1068.5507882360.

Adding to 1220072131 its reverse (1312700221), we get a palindrome (2532772352).

The spelling of 1220072131 in words is "one billion, two hundred twenty million, seventy-two thousand, one hundred thirty-one".