101220212 has 6 divisors (see below), whose sum is σ = 177135378. Its totient is φ = 50610104.

The previous prime is 101220169. The next prime is 101220233. The reversal of 101220212 is 212022101.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 67996516 + 33223696 = 8246^2 + 5764^2 .

It is a junction number, because it is equal to n+sod(n) for n = 101220193 and 101220202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12652523 + ... + 12652530.

It is an arithmetic number, because the mean of its divisors is an integer number (29522563).

Almost surely, 2^101220212 is an apocalyptic number.

It is an amenable number.

101220212 is a deficient number, since it is larger than the sum of its proper divisors (75915166).

101220212 is a wasteful number, since it uses less digits than its factorization.

101220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25305057 (or 25305055 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 101220212 is about 10060.8256122448. The cubic root of 101220212 is about 466.0391636361.

Adding to 101220212 its reverse (212022101), we get a palindrome (313242313).

The spelling of 101220212 in words is "one hundred one million, two hundred twenty thousand, two hundred twelve".