1220210101 has 6 divisors (see below), whose sum is σ = 1341222806. Its totient is φ = 1109281800.

The previous prime is 1220210083. The next prime is 1220210107. The reversal of 1220210101 is 1010120221.

It can be written as a sum of positive squares in only one way, i.e., 691164100 + 529046001 = 26290^2 + 23001^2 .

It is not a de Polignac number, because 1220210101 - 2⁷ = 1220209973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220210107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5042070 + ... + 5042311.

Almost surely, 2^1220210101 is an apocalyptic number.

1220210101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220210101 is a deficient number, since it is larger than the sum of its proper divisors (121012705).

1220210101 is a wasteful number, since it uses less digits than its factorization.

1220210101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10084403 (or 10084392 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1220210101 is about 34931.5058507360. The cubic root of 1220210101 is about 1068.5910651977.

Adding to 1220210101 its reverse (1010120221), we get a palindrome (2230330322).

The spelling of 1220210101 in words is "one billion, two hundred twenty million, two hundred ten thousand, one hundred one".