1220212801 has 2 divisors, whose sum is σ = 1220212802. Its totient is φ = 1220212800.

The previous prime is 1220212771. The next prime is 1220212837. The reversal of 1220212801 is 1082120221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1214452801 + 5760000 = 34849^2 + 2400^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220212801 - 2¹⁵ = 1220180033 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220212871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610106400 + 610106401.

It is an arithmetic number, because the mean of its divisors is an integer number (610106401).

Almost surely, 2^1220212801 is an apocalyptic number.

It is an amenable number.

1220212801 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220212801 is an equidigital number, since it uses as much as digits as its factorization.

1220212801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 1220212801 is about 34931.5444977745. The cubic root of 1220212801 is about 1068.5918533663.

The spelling of 1220212801 in words is "one billion, two hundred twenty million, two hundred twelve thousand, eight hundred one".